Worksheet: Circulation
1. The diagram shows part of a blood smear.
a. Label the four main components of blood. [4]
b. Each type of blood cell has a different job. Explain the function performed by each cell. [3]
i. Red blood cells
.
ii.
.
White blood cells
iii.
.
Platelets
2. The diagram shows a plan of part of the circulation.
(a) Name the blood vessels labeled: [1]
(i) A: ___________________
(ii) B: ___________________
(b) From the diagram given above, identify the letter for the blood vessels which carry oxygenated
blood: ________________
[1]
(c) How does the concentration of oxygen change as the blood passes through the organs?
[1]
______________________________________________________________________________
(d) Identify the chamber of the heart labelled X: __________________________
[1]
3. The diagram shows the human circulatory system. The blood vessels are labelled
with letters.
a. The table names some of the blood vessels in this circulatory system. Complete
the table by giving letters to each blood vessel. The first one has been done for
you. [3]
Name of blood vessels
Letters
Vena cava
L and N
Pulmonary artery
Aorta
Pulmonary vein
b. The diagram shows the chambers of the heart.
i. Measure how many times thicker the wall of chamber B is compared with the wall of chamber A.
[2]
____________________________________________________________________________
_____________________________________________________________________________
ii. Considering their function explain why the wall of chamber B is thicker than the wall of chamber A. [2]
____________________________________________________________________________
____________________________________________________________________________
iii. What is the primary function of blood circulatory system? Explain.
____________________________________________________________________________
[2]